def test_with_app_models(self):
call_command('create_session', 'simple', '2')
from .simple.models import Player
with use_cache():
players = Player.objects.all()
self.assertEqual(len(players), 2)
group = players[0].group
group.save = Mock()
group.round_number += 1
# Query session object to test that it's loaded..
group.session
participants = group.session.participant_set.all()
all_instances = {
players[0], players[1], group, group.session, participants[0],
participants[1]
}
self.assertEqual(set(_get_save_objects_model_instances()),
all_instances)
# No queries are executed. The group model shall be saved, but we
# mocked out the save method. All other models should be left
# untouched.
with self.assertNumQueries(0):
save_objects()
self.assertTrue(group.save.called)
def test_nested_changes(self):
call_command('create_session', 'simple', '1')
# Reset cache.
with use_cache():
# Query participant via session.
session = Session.objects.get()
participant = session.participant_set.get()
participant.is_on_wait_page = not participant.is_on_wait_page
# Save participant.
with self.assertNumQueries(1):
save_objects()
def test_nested_changes(self):
call_command('create_session', 'simple', '1')
# Reset cache.
with use_cache():
# Query participant via session.
session = Session.objects.get()
participant = session.participant_set.get()
participant.is_on_wait_page = not participant.is_on_wait_page
# Save participant.
with self.assertNumQueries(1):
save_objects()
def test_save_only_changed_fields(self):
call_command('create_session', 'simple', '1')
with use_cache():
participant = Participant.objects.get()
with mock.patch.object(django.db.models.Model, 'save') as patched_save:
save_objects()
# in save-the-change 2017 version, save is not called at all
patched_save.assert_called_once_with(update_fields=[])
participant.code = 'hello'
save_objects()
# but is this necessarily the only argument? no
patched_save.assert_called_with(update_fields=['code'])
def test_dont_save_if_no_change(self):
call_command('create_session', 'simple', '1')
with use_cache():
participant = Participant.objects.get()
# We keep track of the participant.
instances = _get_save_objects_model_instances()
self.assertEqual(instances, [participant])
# But we won't save the participant since we didn't change it.
with self.assertNumQueries(0):
save_objects()
def test_dont_save_if_no_change(self):
call_command('create_session', 'simple', '1')
with use_cache():
participant = Participant.objects.get()
# We keep track of the participant.
instances = _get_save_objects_model_instances()
self.assertEqual(instances, [participant])
# But we won't save the participant since we didn't change it.
with self.assertNumQueries(0):
save_objects()
def test_save_only_changed_fields(self):
call_command('create_session', 'simple', '1')
with use_cache():
participant = Participant.objects.get()
with mock.patch.object(django.db.models.Model,
'save') as patched_save:
save_objects()
# in save-the-change 2017 version, save is not called at all
patched_save.assert_called_once_with(update_fields=[])
participant.code = 'hello'
save_objects()
# but is this necessarily the only argument? no
patched_save.assert_called_with(update_fields=['code'])
def test_with_app_models(self):
call_command('create_session', 'simple', '2')
from .simple.models import Player
with use_cache():
players = Player.objects.all()
self.assertEqual(len(players), 2)
group = players[0].group
group.save = Mock()
group.round_number += 1
# Query session object to test that it's loaded..
group.session
participants = group.session.participant_set.all()
all_instances = {
players[0],
players[1],
group,
group.session,
participants[0],
participants[1]
}
self.assertEqual(
set(_get_save_objects_model_instances()),
all_instances)
# No queries are executed. The group model shall be saved, but we
# mocked out the save method. All other models should be left
# untouched.
with self.assertNumQueries(0):
save_objects()
self.assertTrue(group.save.called)